One of the rubber internal fuel lines inside the tank, this "fuel pickup hose" is one of the most common failure parts in the tank. Old gas will typically cause the originals - or even older replacements - to soften and collapse under suction or deteriorate into mush. If you're bringing a car back to life after medium- to long-term storage, read this
Knowledgebase article for more details about to fix this common problem.
That said, unless you have a specific need for JUST this part, we almost always recommend the
modern replacement fuel pump/sender module unit, part number 107000.